On 10/26/2015 9:15 PM, Bruce Griffiths wrote:
The 10811A ocxo uses an oscillator of this type albeit with a lower crystal current, an overtone crystal. However the output stages spoil the PN floor..Cascaded transformer coupled CB stages are somewhat quieter. Bruce
That's right. Burgoon (10811 designer) told me he had to meet other requirements besides noise floor. He had a special one-off version of the 10811 without these compromises that he built to provide a reference source to use for phase noise measurements. In the 10816 rubidium, I used 3 common base transistors in cascade as the output buffer and got similar results to his special version.
Driscoll developed various high frequency crystal oscillators employing MMICs RF splitters together with a crystal, various matching circuits and a diode limiter.
Yes, he did, but long before that work he championed his 2 transistor circuit that was extensively copied by many other designers. Rick _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
